Utilizing gynoecious cucumber (Cucumis sativus L.) inbreds to investigate inheritance of gynoecium, fruit yield and its contrasting traits
2024
Kaur, Tanveer | Dhall, Rajinder | Manchanda, Pooja | Kumari, Priyanka
To determine the inheritance of fruit yield and its component traits in cucumber, three commercial monoecious varieties (Pusa Uday, Punjab Naveen and Pant Kheera-1) were crossed with gynoecious parent (Gy-14) and developed six generations of each cross. The scaling test and the three-parameter model of the joint scaling test revealed the presence of epistasis for most of the traits. Duplicate epistasis was found in the majority of the traits, which will decrease the net gain from heterozygosity because of epistatic effects and dominance cancellation. The fruit weight in Gy-14 ? Pant Kheera-1 showed a higher additive ? dominance type among epistatic interactions, while fruit length in all crosses and fruit breadth in Gy-14 ? Pant Kheera-1 showed a higher additive ? additive type of interaction, indicating the use of pedigree method to improve these traits. Fruit diameter, fruit weight, number of fruits per plant and yield per plant in Gy-14 ?Punjab Naveen, and fruit weight in Gy-14 ? Pusa Uday were found to exhibit a higher dominance ? dominance interaction. Consequently, these traits can be further enhanced through heterosis breeding in the corresponding crosses.
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